What are the reasons for the defects in the four-nozzle slag outlet in the quenching process?

Texaco is Texaco, and the four-nozzle type is the four-nozzle type; they cannot be confused

GE is single-nozzle overhead coal-water slurry gasification. What are the causes of blockage in the four-nozzle slag outlet? Could any experienced users give some advice?

The melting point of coal ash changes; this is caused by untimely adjustment

Both the Four Nozzles and GE Texaco systems use a quenching process, but Texaco uses top-mounted nozzles while Four Nozzles employs parallel, opposite-nozzle arrangements. The reasons for clogging of the slag outlets are similar in some aspects but not identical. Reasons for clogging of the slag outlets in the Four Nozzles system include: 1. A high ash melting point and high ash content; 2. Poor fluidity of the slag; 3. An excessively low furnace temperature; 4. An initially high furnace temperature that may also cause problems after adjustments are made

Reasons affecting slag hole blockage: 1. If the operating temperature of the gasification furnace is too low, the fluidity of the slag decreases, causing it to accumulate more and more at the conical slag hole, which in turn leads to a reduction in the size of the slag hole. 2. Poor-quality coal has high viscosity-temperature characteristics, and the sludge has slow flow properties; these issues were not detected in time during operation, resulting in blockage of the slag outlet. 3. Before shutting down the gasification furnace, the furnace temperature was not increased to melt the slag; as a result, when the furnace was restarted, the temperature was raised rapidly, causing a large amount of slag to flow toward the slag outlet and leading to slag accumulation there, which in turn increased the pressure difference at the slag outlet. 4. A low amount of quenching water or uneven distribution of moisture results in a thin water film in certain areas of the downcomer, causing overheating and deformation of the downcomer; this can lead to slag accumulation and a high pressure difference at the slag outlet.

The operating temperature is low, and judgment is not timely